CVE-2009-2143 in firestats
Summary
by MITRE
PHP remote file inclusion vulnerability in firestats-wordpress.php in the FireStats plugin before 1.6.2-stable for WordPress allows remote attackers to execute arbitrary PHP code via a URL in the fs_javascript parameter.
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Analysis
by VulDB Data Team • 12/01/2024
The vulnerability identified as CVE-2009-2143 represents a critical remote file inclusion flaw within the FireStats WordPress plugin ecosystem. This issue affects versions prior to 1.6.2-stable and specifically targets the firestats-wordpress.php script which serves as the primary execution point for the plugin's functionality. The vulnerability stems from inadequate input validation mechanisms that fail to properly sanitize user-supplied data before incorporating it into file inclusion operations. Attackers can exploit this weakness by manipulating the fs_javascript parameter through HTTP requests, potentially enabling them to inject and execute arbitrary PHP code on the affected WordPress installation.
The technical implementation of this vulnerability aligns with CWE-88, which describes improper neutralization of special elements used in an OS command, and more specifically relates to CWE-94, which encompasses the execution of arbitrary code or commands. The flaw operates by accepting user input directly into a file inclusion context without proper sanitization or validation, creating an environment where malicious actors can specify remote URLs containing malicious PHP payloads. This type of vulnerability falls under the ATT&CK framework's technique T1190, which covers exploitation of remote services, and T1059, which addresses execution through command and scripting interpreters.
The operational impact of this vulnerability extends beyond simple code execution, as it provides attackers with persistent access to compromised WordPress installations. Once exploited, attackers can establish backdoors, exfiltrate sensitive data, modify website content, or use the compromised system as a launch point for further attacks within the network. The FireStats plugin's inclusion of the fs_javascript parameter in its file inclusion logic creates a direct attack surface that can be leveraged for privilege escalation and lateral movement. The vulnerability's remote nature means that exploitation can occur without requiring local system access or prior authentication, making it particularly dangerous for web applications that are publicly accessible.
Mitigation strategies for CVE-2009-2143 should prioritize immediate patching of the FireStats plugin to version 1.6.2-stable or later, which contains the necessary input validation fixes. Organizations should also implement network-level protections such as web application firewalls that can detect and block malicious requests containing suspicious URL patterns in the fs_javascript parameter. Additionally, administrators should enforce strict input validation practices across all WordPress plugins and themes, ensuring that user-supplied data undergoes proper sanitization before being processed. The remediation process should include comprehensive security audits of all installed plugins to identify similar vulnerabilities, as well as implementing monitoring solutions that can detect anomalous file inclusion patterns. System hardening measures such as disabling remote file inclusion capabilities in PHP configurations and restricting file permissions can provide additional defense-in-depth layers. Regular security assessments and vulnerability scanning should be conducted to maintain ongoing protection against similar threats that may emerge in the WordPress ecosystem.